High Performance Sealing for the Hydropower ... - James Walker

High Performance Sealing
for the Hydropower industry
Global supply of sealing products for:
● Francis & Kaplan turbine shafts
● Kaplan blade roots & wicket gates
● Inlet valves, dam gates & fish screens
● Servo motors & jacks
● Pelton turbine injectors…
High Performance Sealing Technology

Main High performance Page Subject sealing Heading for hydropower
Introduction
James Walker’s vast ranges of fluid sealing products and
services are widely used in hydropower applications around
the globe. We back these with top level technical expertise
from dedicated specialists in our Power Generation Industry
Support Team and highly efficient customer support
operations.
HydroSele ® — innovative cartridge seal
Long life, low maintenance sealing for turbine shafts
The quality and longevity of our products are well appreciated by
original equipment manufacturers and hydropower operators,
who rely on their efficiency to improve cost effectiveness and
operational performance by helping to reduce plant downtime.
Your global partner in sealing success
James Walker is a global manufacturer and distributor that
supplies standard ranges and custom-designed sealing products
to virtually every industrial sector. These activities help to keep
plant and equipment running safely, efficiently and with improved
environmental performance, year-in and year-out.
We have a worldwide family of companies with over 50
production, engineering, distribution and customer support sites
spread across Europe, Australasia, Asia Pacific, Africa and the
Americas.
At a local level, a close-knit network of James Walker companies
and official distributors supplies our products and services to
well over 100 countries. Our worldwide IT systems and logistics
operations give customers the surety of supply they need.
HydroSele ® is the result of over ten years of design, development
and long-term field trials on operational Francis and Kaplan-type
equipment working under a wide variety of conditions. This fully-split
cartridge assembly has verified its ability to improve significantly a
turbine’s cost efficiency and operational performance.
Why fit HydroSele ® ?
● Swift pay back on investment. At two years, HydroSele should
have paid for itself in terms of maintenance costs, turbine
downtime and power absorption. At four years, total investment
in cash and downtime could be just one-quarter of that for an
equivalent mechanical seal.
● Long and reliable service life. Prototype HydroSeles are
still running trouble-free after ten years’ operation. This
reliability enables you to schedule maintenance with absolute
confidence.
● Simple to install and adjustment free. HydroSele is one of the
easiest arrangements to fit on a turbine shaft. Downtime is cut
to a minimum and the seal is adjustment free once installed.
● Economical refurbishment. It takes just hours to refurbish
HydroSele on site. Stand-by sealing units are no longer
needed.
● High efficiency sealing. HydroSele’s unique method of
operation gives a very low and controlled level of water leakage.
This greatly reduces the risk of flood damage to plant caused
by uncontrolled leakage past sealing faces.
General information
Health warning: If PTFE or fluoroelastomer (eg, FKM, FFKM, FEPM) products are
heated to elevated temperatures, fumes will be produced which may give unpleasant
effects, if inhaled. Whilst some fumes are emitted below 250°C from fluoroelastomers
or below 300°C from PTFE, the effect at these temperatures is negligible. Care should
be taken to avoid contaminating tobacco with particles of PTFE or fluoroelastomer, or
with PTFE dispersion, which may remain on hands or clothing. Material Safety Data
Sheets (MSDS) are available on request.
Information in this publication and otherwise supplied to users is based on our
general experience and is given in good faith, but because of factors which are
outside our knowledge and control and affect the use of products, no warranty is
given or is to be implied with respect to such information. Specifications are subject
to change without notice. Statements of operating limits quoted in this publication are
not an indication that these values can be applied simultaneously.
Operating capabilities
Shaft diameters: 250mm to 750mm (9.84-29.53 in). Please
consult James Walker if shaft diameter exceeds 750mm.
Maximum pressure at gland: 10bar gauge (145psi gauge).
Maximum surface speed: 10m/s (1969fpm). Please consult
James Walker when higher shaft speeds are involved.
Maximum temperature: 50°C (122°F) at seal/flush interface.
Flush water pressure: 2bar (29psi) above system pressure.
How supplied
Custom manufactured from modular components to suit specific
applications. Service can include installation of HydroSele plus
on-site cartridge refurbishment.
To To order or or get further details, please call your call local your contact shown on on rear cover or or listed at at www.jameswalker.biz

Solosele ® KB Hydro — special design
High integrity sealing for Kaplan blade roots
Chevron ® — multi-ring V packing
For servo motors and valve trunnion
housings
Chevron ® (known as Shallex ® in some
regions) is our universally proven multilip
hydraulic packing. With its robust
construction and long service life, it is
ideal for safety critical operations and
adverse mechanical conditions.
This robust seal was developed specifically for the blade roots of
Kaplan-type turbines. It operates with great success on turbine
blades at hydropower schemes across the world — both as an
OEM fit and as retrofit on older equipment — where it reduces
significantly both turbine downtime and maintenance costs.
Why fit Solosele ® KB Hydro?
● Very cost effective. Solosele ® KB Hydro out-performs and runs
significantly longer than many multi-lip seals and other seal
types installed on Kaplan blade roots.
● High performance sealing. Solosele KB Hydro has excellent
low and high-pressure sealing capabilities under fluctuating
conditions (including negative pressure).
● Keeps oil in and water out. Two seals are installed back-toback
in a housing to prevent hydraulic fluid leaking to the water
course, and prevent water ingress to the blade adjustment
mechanism.
● Adverse mechanical conditions. Solosele KB Hydro will
efficiently seal shafts that run eccentrically on worn bearings.
● Suits OEM applications. Supplied as endless-type seals for
simple and highly effective OEM fitment on new turbines.
● Easy to retrofit. Available as split-type seals for swift On-Site
Joining using James Walker’s special OSJ ® technique that
gives fully-moulded seal performance without removing the
blades.
Recommended dimensions
10mm housing section up to 575mm shaft diameter; 12.5mm
section to 700mm diameter; 16mm section to 900mm diameter;
19mm section to 1100mm diameter; 25mm section above
1100mm diameter. (Please consult James Walker for maximum
diameters and other section/diameter ratios).
Why fit Chevron ® ?
● Suitable for reciprocating (servo motors) and slow oscillating or
rotary action.
● Excellent resistance to extrusion and wear.
● Low friction and low shaft wear for virtually zero maintenance.
Operating capabilities
Maximum pressure — reciprocating: 420bar (to ISO 5597)
Temperature range: -20°C to +100°C
Maximum surface speed — reciprocating: 0.5m/s
How supplied
As endless or split-type rings, in metric and inch sizes. Radial
sections from 4mm upwards. Endless rings to 2.25m OD.
Lofilm ® — versatile multi-lip seal
For servo motors, valve trunnion
housings and Pelton turbine
injectors
Lofilm ® operates reliably for very long
periods with the minimum thickness of
stable fluid film on the dynamic contact
surfaces.
Why fit Lofilm ® ?
● Low pressure sealing capability on servo-motor applications.
● Ideal for trunnion housings on butterfly valves.
● Special sealing systems combining Lofilm and Solosele ® G on
Pelton turbine injectors prove far superior to multi-lip packings.
Operating capabilities
Maximum pressure — reciprocating: 420bar (to ISO 5597)
Temperature range: -20 to +120°C
Maximum surface speed — reciprocating: 0.5m/s.
How supplied
As endless or split-type rings, in metric and inch sizes. Radial
sections from 4mm upwards. Endless rings to 2.25m OD.
How supplied
Endless seals for OEM installation or split-type seals with OSJ
(On-Site Joining) kits for retrofitting — in a range of sections to
suit Kaplan-type blade root housings.
To order or get further details, call your local contact shown on rear cover or listed at www.jameswalker.biz

High performance sealing for hydropower
Solosele ® G — single-element seal
For servo-motors, wicket gates,
fixed wheel gates, trunnion
housings and Pelton turbine
injectors
Robust, compact seal that saves
space without compromising high
integrity sealing.
Why fit Solosele ® G?
● For servo-motors where housing space is restricted.
● Modified version of Solosele ® G is the modern replacement for
‘O’ and ‘U’ rings on wicket gates.
● Protects plastic and fabric bearings on fixed wheel gates.
● Ideal for trunnion housings on butterfly and spherical valves.
● Special sealing systems combining Lofilm ® and Solosele G on
Pelton turbine injectors prove far superior to multi-lip packings.
Operating capabilities
Maximum pressure — reciprocating: 420bar (to ISO 5597)
Temperature range: -20 to +120°C
Maximum surface speed — reciprocating: 0.5m/s.
How supplied
As endless rings, in metric or inch sizes: 3mm ID to 2.3m OD.
Walkersele ® — radial lip seal
For fixed wheel gates, fish screen
gearboxes and low head turbine
shafts
Our vast family of Walkersele ®
radial lip seals is extensively proven
worldwide for long-term bearing
protection throughout the power
generation industry.
Why fit Walkersele ® ?
● Walkersele ® D6 retains lubricant and/or prevents water ingress
on runner bearings of fixed wheel gates.
● Walkersele ® D7 will minimise river pollution from fish screen
gearboxes at heads up to 4bar.
● Walkersele D7 arrangements can be suitable for some low
pressure turbine shafts.
● Swift to fit with our patented OSJ ® (On-Site Joining) kit.
Operating capabilities
Maximum system pressures: 0.2bar for D6 design; 4bar for D7.
Maximum surface speed: typically 15m/s for D6; 12m/s for D7.
How supplied
Metric and inch sizes, in over 10,000 size/material combinations.
Duramid ® — aramid-based gland packing
For small diameter turbine shafts,
penstock expansion joints, pumps
and valves
A tough, high performance gland
packing for sealing duties with
abrasive and aggressive fluids.
Why fit Duramid ® ?
● Long life and minimal shaft wear on
small diameter turbine shafts.
● Extrusion resistance with large clearances for packed glands
on penstock expansion joints.
● Resilient and responsive in long-term service with pumps and
valves handling chemically aggressive and abrasive media.
Operating capabilities
Maximum valve pressure: 150bar
Maximum system pressure — rotary pumps: 25bar
Maximum shaft speed — rotary pumps: 20m/s
Maximum system pressure — reciprocating: 150bar
Maximum surface speed — reciprocating: 1.5m/s
Temperature range: -50°C to +250°C.
How supplied
All popular square sections from 3mm to 25mm, boxed in 8m
lengths. Also available as split preformed rings and sets.
Other recommended gland packings
For pumps and valves across the hydropower industry
Aluflon
● White, conformable packing for valves and rotary or
reciprocating pumps handling media with suspended solids.
● Long life and low maintenance.
● Chemically compatible with media in pH range 0-14.
Arasele
● Soft and tough replacement for hard fibre aramid packings.
● For valves and rotary or reciprocating pumps handling highly
abrasive slurries or aggressive chemical media.
● Kind to shafts — can eliminate unnecessary wear.
Hornet
● High performance packing that absorbs the eccentric action of
worn shafts and bearings.
● For valves and rotary or reciprocating pumps handling highly
abrasive slurries or aggressive chemical media.
Ramiex
● Extremely durable packing with excellent extrusion resistance.
● Used with great success on reciprocating pumps working at
300bar with water containing highly abrasive particles.
● Also suitable for valves and rotary pumps.
To order or get further details, please call your contact shown on rear cover or listed at www.jameswalker.biz

Main High performance Page Subject sealing Heading for hydropower
Nebar ® — cork-elastomer jointings
Flange gaskets on transformers
and switchgear
Seven grades of our Nebar ® corkelastomer
jointings are exceptionally
well proven for long-term flange
sealing duties with heavy electrical
plant.
Nebar ® Black —
Hi-Performance Electrical
● For hydrogen coolers or where SF6 gas is present.
Nebar ® Red — High Pressure
● For high pressure applications in switchgear and transformers.
Nebar ® White — Premium Neoprene Electrical
● Top grade product for transformers and switchgear. Offers long
operational life in contact with mineral oils.
Nebar ® Grey — Premium Nitrile Electrical
● Premium quality, medium hardness grade that meets ABB
specifications for transformers and switchgear.
Nebar ® Orange — Neoprene Electrical
● Economical high-quality grade for switchgear and transformers.
Nebar ® Purple — Nitrile Electrical
● Recommended for transformer lids where mating faces are out
of parallel. Resistant to vapour phase drying.
How supplied
Cut gaskets to any shape, size or quantity. Also in sheet form to
all popular thicknesses.
Elastomer mouldings and extrusions
Inlet valve seals, dam gate seals…
Our plants for the production of
elastomeric components are
amongst the most advanced in the
world. Custom-designed
components for the hydropower
sector include:
● Seals for butterfly and spherical
inlet valves, with a wide selection to
fit Boving types.
Flange gaskets and sheet jointings
General services, including oxygen
and potable water
Our wide range of sheet jointings
includes: non-asbestos fibre grades
for the majority of flange duties,
Supagraf ® expanded graphite types
for high temperatures, and Fluolion ®
Integra White and Blue stabilised PTFE
for use where hygiene and chemical
resistance are top priority. Also ePTFE gasket products by WL
Gore & Associates.
How supplied
Precision cut gaskets to any shape, size or quantity. In sheet or
roll form; sizes and thicknesses dependent on material grade.
Hydraulic sealing
For virtually every hydraulic duty
We have a family of rod/gland seals,
piston seals, wipers and bearing
strips that suits the heaviest jacks and
cylinders, down to the most accurate
control actuators and instruments.
How supplied
Standard or non-standard sizes.
RotaBolt ® — tension control fasteners
Assured tension across bolted joints
Our RotaBolt ® tension control fasteners
provide reliable bolted connections in
applications where cost, health and
safety or environmental consequences
are of paramount importance on
structural assemblies and flange joints.
How supplied
Standard range: M12 to M125 bolts or M18 to M125 studs in most
materials, with other sizes available. Customer-supplied fasteners
can be modified.
● Vertical lift sliding gate seals — as solid elastomer extrusions,
fabric-reinforced elastomer, or elastomer with a bonded
cladding of wear-resistant PTFE.
To To order or or get further details, please call your call local your contact shown on on rear cover or or listed at at www.jameswalker.biz

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Solosele ® KB Hydro __ for
Kaplan turbine blade roots
Cost effective, long-term sealing
Endless or On-Site Joining (OSJ)
Efficient sealing on highly eccentric shafts
Greatly reduces turbine downtime
Compression Packings
The comprehensive guide
to compression packing
products for all pumps,
valves, lids and gland
sealing duties
High Performance Sealing Technology
High Performance Sealing Technology
Hydrosele ® Solosele ® KB Hydro Compression packings Gaskets & jointings
RotaBolt ®
Walkersele ®
James Walker & Co Ltd
Power Generation Industry Support Team
1 Millennium Gate, Westmere Drive
Crewe, Cheshire CW1 6AY, UK
Tel: +44 (0)1270 536000
Fax: +44 (0)1270 536100
Email: powergen.jwc.uk@jameswalker.biz
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